Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
congo can » congo call, cong van, congo a
xi human » i human, ii human, 2 human
gene anh » gene bank
gene one » gene clone, gene gene, gene we
cong seo » hong seo, cong shu, cong sun
yang xi » yang di, yang yi, yang jui

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: yang yang xi human ((gene anh) OR (gene one)) minh ((cong seo) or (congo can)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: yang yang xi human ((gene anh) OR (gene one)) minh ((cong seo) OR (congo can)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "yang yang xi human ((gene anh) OR (gene one)) minh ((cong seo) or (congo can)) ;".
• Adding a wildcard symbol may retrieve word variants: yang yang xi human ((gene anh) OR (gene one)) minh ((cong seo) or (congo can)) ;*.